A container is constructed from a pouch having a front sheet, a rear sheet and a bottom sheet. The bottom sheet of the pouch is folded along a midline thereof with flaps extending downward from the fold line. Each of the bottom edges of the flaps are welded to or integral with one bottom edge...http://www.google.com/patents/US5772332?utm_source=gb-gplus-sharePatent US5772332 - Container having a rectangular base and its manufacturing
